On 21 Nov 2023, at 10:46, Ryan Roberts wrote: >> >> vm-scalability results >> === >> >> ========================================================================================= >> compiler/kconfig/rootfs/runtime/tbox_group/test/testcase: >> gcc-13/defconfig/debian/300s/qemu-vm/mmap-xread-seq-mt/vm-scalability >> >> commit: >> 6.6.0-rc4-mm-everything-2023-10-21-02-40+ >> 6.6.0-rc4-split-folio-in-compaction+ >> 6.6.0-rc4-folio-migration-in-compaction+ >> 6.6.0-rc4-folio-migration-free-page-split+ >> 6.6.0-rc4-folio-migration-free-page-split-sort-src+ >> >> 6.6.0-rc4-mm-eve 6.6.0-rc4-split-folio-in-co 6.6.0-rc4-folio-migration-i 6.6.0-rc4-folio-migration-f 6.6.0-rc4-folio-migration-f >> ---------------- --------------------------- --------------------------- --------------------------- --------------------------- >> %stddev %change %stddev %change %stddev %change %stddev %change %stddev >> \ | \ | \ | \ | \ >> 12896955 +2.7% 13249322 -4.0% 12385175 ± 5% +1.1% 13033951 -0.4% 12845698 vm-scalability.throughput > > Hi Zi, > > Are you able to add any commentary to these results as I'm struggling to > interpret them; Is a positive or negative change better (are they times or > rates?). What are the stddev values? The title suggests percent but the values > are huge - I'm trying to understand what the error bars look like - are the > swings real or noise? The metric is vm-scalability.throughput, so the larger the better. Some %stddev are not present since they are too small. For 6.6.0-rc4-folio-migration-in-compaction+, %stddev is greater than %change, so the change might be noise. Also, I talked to DavidH in last THP Cabal meeting about this. He suggested that there are a lot of noise in vm-scalability like what I have here and I should run more iterations and on bare metal. I am currently rerun them on a baremetal and more iterations on the existing VM and report the results later. Please note that the runs really take some time. In addition, I will find other fragmentation-related benchmarks, so we can see the impact on memory fragmentation. -- Best Regards, Yan, Zi
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